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Check what the result would have been if Sundaram had chosen the numbers shown below. 1. 27

Check what the result would have been if Sundaram had chosen the numbers shown below.

    Q1. 27

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As we know 

(10a + b) + (10b + a) = 11a + 11b = 11 (a + b)

here a = 2 and b = 7 

27 + 72 = 99= 11 *9 =  a multiple of 11

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